Breadcrumb Home > Thesaurus > R Synonyms of romaine Find synonyms for: Noun 1. cos, cos lettuce, romaine, romaine lettuce, lettuce usage: lettuce with long dark-green leaves in a loosely packed elongated head WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of romaine (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: preternatural Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language